Pufferfish can still detect invisible players.

What I expected to happen was...:
The pufferfish, like other mobs, shouldn't be able to detect invisible players.

What actually happened was...:
The pufferfish detects players that walk up close even though they are invisible-

Steps to Reproduce:
1. Find a pufferfish in survival or spawn one in
2. Effect the player with invisibility
3. Walk up to the pufferfish and get effected with poison